12125391 has 8 divisors (see below), whose sum is σ = 16186800. Its totient is φ = 8073792.

The previous prime is 12125359. The next prime is 12125413. The reversal of 12125391 is 19352121.

12125391 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12125391 - 2⁵ = 12125359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12125341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221 + ... + 5073.

It is an arithmetic number, because the mean of its divisors is an integer number (2023350).

Almost surely, 2^12125391 is an apocalyptic number.

12125391 is a deficient number, since it is larger than the sum of its proper divisors (4061409).

12125391 is a wasteful number, since it uses less digits than its factorization.

12125391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4905.

The product of its digits is 540, while the sum is 24.

The square root of 12125391 is about 3482.1532131714. The cubic root of 12125391 is about 229.7375140382.

The spelling of 12125391 in words is "twelve million, one hundred twenty-five thousand, three hundred ninety-one".